'use strict';

function choose_no_common_elements(collection_a, collection_b) {
     var arr=[];
     for(let ai=0;ai<collection_a.length;ai++){
              if(collection_b.includes(collection_a[ai])){

              }else{
                arr.push(collection_a[ai]);
              }
     }
  return arr;//在这里写入代码
}

module.exports = choose_no_common_elements;
